[Strong Plastic Construction]- The cache aerator kit is made of strong ABS material which is strength and reliability, Strong wrench NOT easy to bends, so has a good grip.Quick and easy to replace[16 Pack]- 12pieces faucet cache aerator of Male 16.5mm/ 18.5mm/21.5mm/24mm,meet your different sizes needs. key ring keeps them together and includes 4 size cache aerator key,In case of loss and provide convenience for your storage[Multi Size Aerator Keys]- The replacement part comes with 4 different size removal wrenches Tool, which will help you to remove or install in minutes, Save both money and time[No Spraying]- Each aerator has a fine mesh which can ease the impact of water, and prevent water from splashing by generating lots of .No spraying all over. Shaping the water stream out of the spout[Wide application] Flow restrictor insert faucet aerators can be fitted to kitchen sink faucets, bathroom taps and lavatory faucets spout , suitable for , , , , , and GrocheColour: blue + blackMaterial: plasticPackage Contents:12 x bubblers (16.5mm/18.5mm/21.5mm/24mm)4 x wrenchesOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.